My new car has an in-dash slot for a SIM card, I'd like to be reachable
on my mobile or my car phone and 2 SIMS seems to be the best option for
me. However, I don't have an ideal solution at present and would like
to confirm my current understanding and seek options. I currently have
a Vodafone contract phone.

- Vodafone multiSIM will not support 3G/GPRS as far as I know (I do a
lot of mobile browing)
- Vodafone tell me that multiSIM would require a new contract (I'm not
due for renewal)
- Vodafone PAYG and O2 PAYG do not allow call forwarding to any number
other than voicemail

The partial solution I have so far is to use a Vodafone PAYG SIM in the
car with the following forwarding in place:
- Handset/contract number set to forward to car/PAYG number when
unobtainable
- Car/PAYG number voicemail switched on

When I get into the car, I switch my handset to offline mode (i.e.
unobtainable) so that calls go to the car. However, I am in a very poor
reception area at home, so even when I want to be obtainable, I'm not.
If I'm at home and out of the car calls therefore wind up on the
car/PAYG voicemail. I ideally wanted to call forward this number on
busy/no answer/unobtainable back to my handset/contract voicemailbox.

Flaws
 - I need to switch handset between off and online when entering and
leaving the car
 - I now have 2 voicemailboxes to manage
 - SMS are not forwarded, so while in the car I don't receive text

Nowhere near as nice as my old bluetooth carkit :-(

Ideally I would have a clone of my current contract SIM in the car, but
this doesn't seem possible. The only other options that I can see are:
 - get a contract (or Fresh) SIM for the car which will allow
forwarding (still no SMS in car and need to switch on and off)
 - get a multiSIM and live without GPRS/3G (not really an option)
 - use YAC or another personal numbering service to manage 2 SIMs (not
an option - new number)
 - fit a bluetooth carkit and ignore the inbuilt one :-)

Hope all that is clear-ish.....

Any comments or suggestions welcomed

Craig